Recent Publications

  • Decima M, Landry MR, Stukel M.R, Lopez-Lopez L., Krause J.W.  2016.  Mesozooplankton biomass and grazing in the Costa Rica Dome: amplifying variability through the plankton food web. Journal of Plankton Research. 38:317-330.
    Abstract Summary:

    We investigated standing stocks and grazing rates of mesozooplankton assemblages in the Costa Rica Dome (CRD), an open-ocean upwelling ecosystem in the eastern tropical Pacific. While phytoplankton biomass in the CRD is dominated by picophytoplankton (<2-mu m cells) with especially high concentrations of Synechococcus spp., we found high mesozooplankton biomass (similar to 5 g dry weight m(-2)) and grazing impact (12-50% integrated water...

  • Baines SB, Chen X, Vogt S, Fisher NS, Twining BS, Landry MR.  2016.  Microplankton trace element contents: implications for mineral limitation of mesozooplankton in an HNLC area. Journal of Plankton Research. 38:256-270.
    Abstract Summary:

    Mesozooplankton production in high-nutrient low-chlorophyll regions of the ocean may be reduced if the trace element concentrations in their food are insufficient to meet growth and metabolic demands. We used elemental microanalysis (SXRF) of single-celled plankton to determine their trace metal contents during a series of semi-Lagrangian drift studies in an HNLC upwelling region, the Costa Rica Dome (CRD). Cells from the surface mixed layer...

  • Kumar N., Feddersen F, Suanda S., Uchiyama Y., McWilliams J..  2016.  Mid- to inner-shelf coupled ROMS-SWAN model-data comparison of currents and temperature: Diurnal and semidiurnal variability. Journal of Physical Oceanography. 46:841-862.
    Abstract Summary:

    Accurately representing diurnal and semidiurnal internal variability is necessary to investigate inner-shelf to midshelf exchange processes. Here, a coupled Regional Ocean Model System (ROMS)-Simulating Waves Nearshore (SWAN) model is compared to observed diurnal and semidiurnal internal tidal variability on the mid and inner shelf (26-8 m water depth) near San Pedro Bay, California. Modeled mean stratification is about one-half of that...

  • Krause J.W, Stukel M.R, Taylor A.G, Taniguchi D.AA, de Verneil A., Landry MR.  2016.  Net biogenic silica production and the contribution of diatoms to new production and organic matter export in the Costa Rica Dome ecosystem. Journal of Plankton Research. 38:216-229.
    Abstract Summary:

    We determined the net rate of biogenic silica (bSiO(2)) production and estimated the diatom contribution to new production and organic matter export in the Costa Rica Dome during summer 2010. The shallow thermocline significantly reduces bSiO(2) dissolution rates below the mixed layer, leading to significant enhancement of bSiO(2) relative to organic matter (silicate-pump condition). This may explain why deep export of bSiO(2) in this region...

  • Zirino A., Elwany H., Facca C., Maicu F., Neira C., Mendoza G..  2016.  Nitrogen to phosphorus ratio in the Venice (Italy) Lagoon (2001-2010) and its relation to macroalgae. Marine Chemistry. 180:33-41.
    Abstract Summary:

    Analysis of the annually-averaged 2001-2010 monthly nutrient data from 13 stations in the Venice Lagoon (Italy) shows that the concentrations of dissolved nitrogen (N) species, measured as total dissolved N (TDN), have increased over time while that of phosphorus (P) species, measured as total dissolved P (TDP) have decreased. During the study period, the TDN/TDP ratio in the lagoon rose from about 46:1 to 100:1 (by atoms), a level at which...

  • Ohman MD, Romagnan J.B.  2016.  Nonlinear effects of body size and optical attenuation on Diel Vertical Migration by zooplankton. Limnology and Oceanography. 61:765-770.
    Abstract Summary:

    We adopt a trait-based approach to explain Diel Vertical Migration (DVM) across a diverse assemblage of planktonic copepods, utilizing body size as a master trait. We find a reproducible pattern of body size-dependence of day and night depths occupied, and of DVM. Both the smallest surface-dwelling and the largest deeper-dwelling copepods refrain from migrations, while intermediate-sized individuals show pronounced DVM. This pattern...

  • Taylor A.G, Landry MR, Freibott A., Selph K.E, Gutierrez-Rodriguez A..  2016.  Patterns of microbial community biomass, composition and HPLC diagnostic pigments in the Costa Rica upwelling dome. Journal of Plankton Research. 38:183-198.
    Abstract Summary:

    We investigated biomass, size-structure, composition, depth distributions and spatial variability of the phytoplankton community in the Costa Rica Dome (CRD) in June-July 2010. Euphotic zone profiles were sampled daily during Lagrangian experiments in and out of the dome region, and the community was analyzed using a combination of digital epifluorescence microscopy, flow cytometry and HPLC pigments. The mean depth-integrated biomass of...

  • Gutierrez-Rodriguez A., Selph K.E, Landry MR.  2016.  Phytoplankton growth and microzooplankton grazing dynamics across vertical environmental gradients determined by transplant in situ dilution experiments. Journal of Plankton Research. 38:271-289.
    Abstract Summary:

    The Costa Rica Dome (CRD) represents a classic case of the bloom-forming capacity of small phytoplankton. Unlike other upwelling systems, autotrophic biomass in the CRD is dominated by picocyanobacteria and small eukaryotes that outcompete larger diatoms and reach extremely high biomass levels. We investigated responses of the subsurface phytoplankton community of the CRD to changes associated with vertical displacement of water masses,...

  • Landry MR, Selph K.E, Decima M, Gutierrez-Rodriguez A., Stukel M.R, Taylor A.G, Pasulka A.L.  2016.  Phytoplankton production and grazing balances in the Costa Rica Dome. Journal of Plankton Research. 38:366-379.
    Abstract Summary:

    We investigated phytoplankton production rates and grazing fates in the Costa Rica Dome (CRD) during summer 2010 based on dilution depth profiles analyzed by flow cytometry and pigments and mesozooplankton grazing assessed by gut fluorescence. Three community production estimates, from C-14 uptake (1025+/-113 mg C m(-2) day(-1)) and from dilution experiments analyzed for total Chla (990+/-106 mg C m(-2) day(-1)) and flow cytometry populations...

  • Selph K.E, Landry MR, Taylor A.G, Gutierrez-Rodriguez A., Stukel M.R, Wokuluk J., Pasulka A..  2016.  Phytoplankton production and taxon-specific growth rates in the Costa Rica Dome. Journal of Plankton Research. 38:199-215.
    Abstract Summary:

    During summer 2010, we investigated phytoplankton production and growth rates at 19 stations in the eastern tropical Pacific, where winds and strong opposing currents generate the Costa Rica Dome (CRD), an open-ocean upwelling feature. Primary production (C-14-incorporation) and group-specific growth and net growth rates (two-treatment sea-water dilution method) were estimated from samples incubated in situ at eight depths. Our cruise...

  • Landry MR, de Verneil A., Goes J.I, Moffett J.W.  2016.  Plankton dynamics and biogeochemical fluxes in the Costa Rica Dome: introduction to the CRD Flux and Zinc Experiments. Journal of Plankton Research. 38:167-182.
    Abstract Summary:

    The Costa Rica Dome (CRD) is an open-ocean upwelling system in the Eastern Tropical Pacific that overlies the ocean's largest oxygen minimum zone (OMZ). The region has unique characteristics, biomass dominance by picophytoplankton, suppressed diatoms, high biomass of higher consumers and presumptive trace metal limitation, but is poorly understood in terms of pelagic stock and process relationships, including productivity and production...

  • Chappell P.D, Vedmati J., Selph K.E, Cyr H.A, Jenkins B.D, Landry MR, Moffett J.W.  2016.  Preferential depletion of zinc within Costa Rica upwelling dome creates conditions for zinc co-limitation of primary production. Journal of Plankton Research. 38:244-255.
    Abstract Summary:

    The Costa Rica Dome (CRD) is a wind-driven feature characterized by high primary production and an unusual cyanobacterial bloom in surface waters. It is not clear whether this bloom arises from top-down or bottom-up processes. Several studies have argued that trace metal geochemistry within the CRD contributes to the composition of the phytoplankton assemblages, since cyanobacteria and eukaryotic phytoplankton have different transition metal...

  • Switzer RD, P. Parnell E, Leichter JL, Driscoll NW.  2016.  The effects of tectonic deformation and sediment allocation on shelf habitats and megabenthic distribution and diversity in southern California. Estuarine, Coastal and Shelf Science. 169:25-37.
    Abstract Summary:

    Landscape and seascape structures are typically complex and manifest as patch mosaics within characteristic biomes, bordering one another in gradual or abrupt ecotones. The underlying patch structure in coastal shelf ecosystems is driven by the interaction of tectonic, sedimentary, and sea level dynamic processes. Animals and plants occupy and interact within these mosaics. Terrestrial landscape ecological studies have shown that patch...

  • Cloern J.E, Abreu P.C, Carstensen J., Chauvaud L., Elmgren R., Grall J., Greening H., Johansson J.OR, Kahru M, Sherwood E.T et al..  2016.  Human activities and climate variability drive fast-paced change across the world's estuarine-coastal ecosystems. Global Change Biology. 22:513-529.
    Abstract Summary:

    Time series of environmental measurements are essential for detecting, measuring and understanding changes in the Earth system and its biological communities. Observational series have accumulated over the past 2-5 decades from measurements across the world's estuaries, bays, lagoons, inland seas and shelf waters influenced by runoff. We synthesize information contained in these time series to develop a global view of changes occurring in...

  • Smith SR, Glé C, Abbriano RM, Traller JC, Davis A, Trentacoste E, Vernet M, Allen AE, Hildebrand M.  2016.  Transcript level coordination of carbon pathways during silicon starvation-induced lipid accumulation in the diatom Thalassiosira pseudonana. New Phytologist.
    Abstract Summary:

    * Diatoms are one of the most productive and successful photosynthetic taxa on Earth and possess attributes such as rapid growth rates and production of lipids, making them candidate sources of renewable fuels. Despite their significance, few details of the mechanisms used to regulate growth and carbon metabolism are currently known, hindering metabolic engineering approaches to enhance productivity. * To characterize the transcript level...

  • Booth A.D, Emir E., Diez A..  2016.  Approximations to seismic AVA responses: Validity and potential in glaciological applications. Geophysics. 81:WA1-WA11.
    Abstract Summary:

    Amplitude-variation-with-angle (AVA) methods establish the seismic properties of material either side of a reflective interface, and their use is growing in glaciology. The AVA response of an interface is defined by the complex Knott-Zoeppritz (K-Z) equations, numerous approximations to which we typically assume weak interface contrasts and isotropic propagation, inconsistent with the strong contrasts at glacier beds and the vertically...

  • Snyder S., Nadler L.E, Bayley J.S, Svendsen M.BS, Johansen J.L, Domenici P., Steffensen J.F.  2016.  Effect of closed v. intermittent-flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata. Journal of Fish Biology. 88:252-264.
    Abstract Summary:

    This study compares the critical oxygen saturation (O-2crit) levels of the shiner perch Cymatogaster aggregata obtained using two different methods wherein hypoxia is induced either by the fish's respiration (closed respirometry) or by degassing oxygen with nitrogen (intermittent-flow respirometry). Fish exhibited loss of equilibrium at a higher O-2 saturation in the closed respirometry method when compared with the intermittent-flow method....

  • Lindegren M, Checkley DM, Ohman MD, Koslow JA, Goericke R.  2016.  Resilience and stability of a pelagic marine ecosystem. Proceedings of the Royal Society B-Biological Sciences. 283
    Abstract Summary:

    The accelerating loss of biodiversity and ecosystem services worldwide has accentuated a long-standing debate on the role of diversity in stabilizing ecological communities and has given rise to a field of research on biodiversity and ecosystem functioning (BEF). Although broad consensus has been reached regarding the positive BEF relationship, a number of important challenges remain unanswered. These primarily concern the underlying...

  • Neira C., Mendoza G., Porrachia M., Stransky C., Levin L.A.  2015.  Macrofaunal recolonization of copper-contaminated sediments in San Diego Bay. Marine Pollution Bulletin. 101:794-804.
    Abstract Summary:

    Effects of Cu-loading on macrofaunal recolonization were examined in Shelter Island Yacht Basin (San Diego Bay, California). Sediments with high and low Cu levels were defaunated and Cu-spiked, translocated, and then placed back into the environment These demonstrated that the alteration observed in benthic communities associated with Cu contamination occurs during initial recolonization. After a 3-month exposure to sediments with varying Cu...

  • Mehring A.S, Levin L.A.  2015.  Potential roles of soil fauna in improving the efficiency of rain gardens used as natural stormwater treatment systems. Journal of Applied Ecology. 52:1445-1454.
    Abstract Summary:

    Natural treatment systems such as rain gardens aim to overcome the negative effects of urbanization on water quality, availability, and freshwater and marine ecosystem integrity by mimicking the natural water cycle in urban planning and design. While soils in these systems are inhabited by a diverse array of invertebrates, the soil macrofauna is ignored in the vast majority of studies on new or existing rain gardens. Here, we review the...

  • Masich J., Chereskin TK, Mazloff MR.  2015.  Topographic form stress in the Southern Ocean State Estimate. Journal of Geophysical Research-Oceans. 120:7919-7933.
    Abstract Summary:

    We diagnose the Southern Ocean momentum balance in a 6 year, eddy-permitting state estimate of the Southern Ocean. We find that 95% of the zonal momentum input via wind stress at the surface is balanced by topographic form stress across ocean ridges, while the remaining 5% is balanced via bottom friction and momentum flux divergences at the northern and southern boundaries of the analysis domain. While the time-mean zonal wind stress field...

  • Levin L.A, Le Bris N..  2015.  The deep ocean under climate change. Science. 350:766-768.
    Abstract Summary:

    The deep ocean absorbs vast amounts of heat and carbon dioxide, providing a critical buffer to climate change but exposing vulnerable ecosystems to combined stresses of warming, ocean acidification, deoxygenation, and altered food inputs. Resulting changes may threaten biodiversity and compromise key ocean services that maintain a healthy planet and human livelihoods. There exist large gaps in understanding of the physical and ecological...

  • Rose K.A, Fiechter J., Curchitser E.N, Hedstrom K., Bernal M., Creekmore S., Haynie A., Ito S., Lluch-Cota S., Megrey B.A et al..  2015.  Demonstration of a fully-coupled end-to-end model for small pelagic fish using sardine and anchovy in the California Current. Progress in Oceanography. 138:348-380.
    Abstract Summary:

    We describe and document an end-to-end model of anchovy and sardine population dynamics in the California Current as a proof of principle that such coupled models can be developed and implemented. The end-to-end model is 3-dimensional, time-varying, and multispecies, and consists of four coupled sub-models: hydrodynamics, Eulerian nutrient-phytoplankton-zooplankton (NPZ), an individual-based full life cycle anchovy and sardine submodel, and...

  • Ludka B.C, Guza RT, O'Reilly W.C, Yates M.L.  2015.  Field evidence of beach profile evolution toward equilibrium. Journal of Geophysical Research-Oceans. 120:7574-7597.
    Abstract Summary:

    An equilibrium framework is used to describe the evolution of the cross-shore profile of five beaches (medium grain size sand) in southern California. Elevations were observed quarterly on cross-shore transects extending from the back beach to 8 m depth, for 3-10 years. Transects spaced 100 m in the alongshore direction are alongshore averaged into nineteen 700-900 m long sections. Consistent with previous observations, changes about the time...

  • Cape M.R, Vernet M, Skvarca P, Marinsek S, Scambos T, Domack E.  2015.  Foehn winds link climate-driven warming to ice shelf evolution in Antarctica. Journal of Geophysical Research: Atmospheres. 120:11,037-11,057.
    Abstract Summary:

    Rapid warming of the Antarctic Peninsula over the past several decades has led to extensive surface melting on its eastern side, and the disintegration of the Prince Gustav, Larsen A, and Larsen B ice shelves. The warming trend has been attributed to strengthening of circumpolar westerlies resulting from a positive trend in the Southern Annular Mode (SAM), which is thought to promote more frequent warm, dry, downsloping foehn winds along the...

  • Case D.H, Pasulka A.L, Marlow J.J, Grupe B.M, Levin L.A, Orphan V.J.  2015.  Methane seep carbonates host distinct, diverse, and dynamic microbial assemblages. Mbio. 6
    Abstract Summary:

    Marine methane seeps are globally distributed geologic features in which reduced fluids, including methane, are advected upward from the subsurface. As a result of alkalinity generation during sulfate-coupled methane oxidation, authigenic carbonates form slabs, nodules, and extensive pavements. These carbonates shape the landscape within methane seeps, persist long after methane flux is diminished, and in some cases are incorporated into the...

  • Fiedler J.W, Brodie K.L, McNinch J.E, Guza RT.  2015.  Observations of runup and energy flux on a low-slope beach with high-energy, long-period ocean swell. Geophysical Research Letters. 42:9933-9941.
    Abstract Summary:

    The transformation of surface gravity waves from 11 m depth to runup was observed on the low-sloped (1/80) Agate Beach, Oregon, with a cross-shore transect of current meters, pressure sensors, and a scanning lidar. Offshore wave heights H-0 ranged from calm (0.5 m) to energetic (> 7 m). Runup, measured with pressure sensors and a scanning lidar, increases linearly with (H0L0)(1/2), with L-0 the deep-water wavelength of the spectral peak....

  • Kahru M, Kudela R.M, Anderson C.R, Mitchell B.G.  2015.  Optimized merger of ocean chlorophyll algorithms of MODIS-Aqua and VIIRS. Ieee Geoscience and Remote Sensing Letters. 12:2282-2285.
    Abstract Summary:

    Standard ocean chlorophyll-a (Chla) products from currently operational satellite sensors Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua and Visible Infrared Imager Radiometer Suite (VIIRS) underestimate medium and high in situ Chla concentrations and have approximately 9% bias between each other in the California Current. By using the regional optimization approach of Kahru et al., we minimized the differences between satellite...

  • Stukel M.R, Kahru M, Benitez-Nelson C.R, Decima M, Goericke R, Landry MR, Ohman MD.  2015.  Using Lagrangian-based process studies to test satellite algorithms of vertical carbon flux in the eastern North Pacific Ocean. Journal of Geophysical Research-Oceans. 120:7208-7222.
    Abstract Summary:

    The biological carbon pump is responsible for the transport of similar to 5-20 Pg C yr(-1) from the surface into the deep ocean but its variability is poorly understood due to an incomplete mechanistic understanding of the complex underlying planktonic processes. In fact, algorithms designed to estimate carbon export from satellite products incorporate fundamentally different assumptions about the relationships between plankton biomass,...

  • Barnard P.L, Short A.D, Harley M.D, Splinter K.D, Vitousek S., Turner I.L, Allan J., Banno M., Bryan K.R, Doria A. et al..  2015.  Coastal vulnerability across the Pacific dominated by El Nino/Southern Oscillation. Nature Geoscience. 8:801-+.
    Abstract Summary:

    To predict future coastal hazards, it is important to quantify any links between climate drivers and spatial patterns of coastal change. However, most studies of future coastal vulnerability do not account for the dynamic components of coastal water levels during storms, notably wave-driven processes, storm surges and seasonal water level anomalies, although these components can add metres to water levels during extreme events. Here we...

  • Cefarelli AO, Ferrario ME, Vernet M.  2015.  Diatoms (Bacillariophyceae) associated with free-drifting Antarctic icebergs: taxonomy and distribution. Polar Biology. :1-17.
    Abstract Summary:

    Free-drifting Antarctic icebergs can alter the phytoplankton in surrounding waters. In addition, diatom mats live attached to the submerged walls of the icebergs. In this study we describe a diverse diatom community associated with these mats and an atypical planktonic community in waters affected by icebergs. Samples were collected in the winter of 2008 and fall of 2009 from Antarctic icebergs and their adjacent waters, utilizing a remote...

  • Netburn A.N, Koslow JA.  2015.  Dissolved oxygen as a constraint on daytime deep scattering layer depth in the southern California current ecosystem. Deep-Sea Research Part I-Oceanographic Research Papers. 104:149-158.
    Abstract Summary:

    Climate change-induced ocean deoxygenation is expected to exacerbate hypoxic conditions in mesopelagic waters off the coast of southern California, with potentially deleterious effects for the resident fauna. In order to understand the possible impacts that the oxygen minimum zone expansion will have on these animals, we investigated the response of the depth of the deep scattering layer (i.e., upper and lower boundaries) to natural...

  • Koslow JA, Miller E.F, McGowan J.A.  2015.  Dramatic declines in coastal and oceanic fish communities off California. Marine Ecology Progress Series. 538:221-227.
    Abstract Summary:

    The California Cooperative Oceanic Fisheries Investigations (CalCOFI) ichthyoplankton surveys and systematic sampling of southern California power plant cooling-water intakes (PPI) provide independent, complementary time series to assess fish communities off southern California from nearshore to oceanic environments. The PPI program has sampled the shallow nearshore fish community at 5 sites along the coast of southern California since 1972,...

  • Nordstrom M.C, Demopoulos A.WJ, Whitcraft C.R, Rismondo A., McMillan P., Gonzalez J.P, Levin L.A.  2015.  Food web heterogeneity and succession in created saltmarshes. Journal of Applied Ecology. 52:1343-1354.
    Abstract Summary:

    Ecological restoration must achieve functional as well as structural recovery. Functional metrics for re-establishment of trophic interactions can be used to complement traditional monitoring of structural attributes. In addition, topographic effects on food web structure provide added information within a restoration context; often, created sites may require spatial heterogeneity to effectively match structure and function of natural...

  • Askarizadeh A., Rippy MA, Fletcher T.D, Feldman D.L, Peng J., Bowler P., Mehring A.S, Winfrey B.K, Vrugt J.A, AghaKouchak A. et al..  2015.  From rain tanks to catchments: Use of low-impact development to address hydrologic symptoms of the urban stream syndrome. Environmental Science & Technology. 49:11264-11280.
    Abstract Summary:

    Catchment urbanization perturbs the water and sediment budgets of streams, degrades stream health and function, and causes a constellation of flow, water quality, and ecological symptoms collectively known as the urban stream syndrome. Low-impact development (LID) technologies address the hydrologic symptoms of the urban stream syndrome by mimicking natural flow paths and restoring a natural water balance. Over annual time scales, the volumes...

  • Grimes D.J, Cortale N., Baker K., McNamara D.E.  2015.  Nonlinear forecasting of intertidal shoreface evolution. Chaos. 25
    Abstract Summary:

    Natural systems dominated by sediment transport are notoriously difficult to forecast. This is particularly true along the ocean coastline, a region that draws considerable human attention as economic investment and infrastructure are threatened by both persistent, long-term and acute, event driven processes (i.e., sea level rise and storm damage, respectively). Forecasting the coastline's evolution over intermediate time (daily) and space (...

  • Fang H.Z, de Callafon R.A, Franks PJS.  2015.  Smoothed estimation of unknown inputs and states in dynamic systems with application to oceanic flow field reconstruction. International Journal of Adaptive Control and Signal Processing. 29:1224-1242.
    Abstract Summary:

    Forward-backward smoothing based unknown input and state estimation for dynamic systems is studied in this paper, motivated by reconstruction of an oceanographic flow field using a swarm of buoyancy-controlled drifters. The development is conducted in a Bayesian framework. A Bayesian paradigm is constructed first to offer a probabilistic view of the unknown quantities given the measurements. Then a maximum a posteriori is established to build...

  • Kaniewska P., Chan C.KK, Kline D., Ling E.YS, Rosic N., Edwards D., Hoegh-Guldberg O., Dove S..  2015.  Transcriptomic changes in coral holobionts provide insights into physiological challenges of future climate and ocean change. Plos One. 10
    Abstract Summary:

    Tropical reef-building coral stress levels will intensify with the predicted rising atmospheric CO2 resulting in ocean temperature and acidification increase. Most studies to date have focused on the destabilization of coral-dinoflagellate symbioses due to warming oceans, or declining calcification due to ocean acidification. In our study, pH and temperature conditions consistent with the end-of-century scenarios of the Intergovernmental...

  • Highlighted Publication Intraseasonal altimetric SSH (cm) from delayed-time AVISO product
    Gasparin F., Roemmich D., Gilson J., Cornuelle B..  2015.  Assessment of the upper-ocean observing system in the equatorial Pacific: The role of Argo in resolving intraseasonal to interannual variability*. Journal of Atmospheric and Oceanic Technology. 32:1668-1688.
    Abstract Summary:

    Using more than 10 years of Argo temperature and salinity profiles (2004-14), a new optimal interpolation (OI) of the upper ocean in the equatorial Pacific is presented. Following Roemmich and Gilson's procedures, which were formulated for describing monthly large-scale anomalies, here every 5 days anomaly fields are constructed with improvements in the OI spatial covariance function and by including the time domain. The comparison of Argo...

  • Lee Z.P, Marra J., Perry M.J, Kahru M.  2015.  Estimating oceanic primary productivity from ocean color remote sensing: A strategic assessment. Journal of Marine Systems. 149:50-59.
    Abstract Summary:

    It has long been realized that approaches using satellite ocean-color remote sensing are the only feasible means to quantify primary productivity (PP) adequately for the global ocean. Through decades of dedicated efforts and with the help of various satellite ocean-color missions, great progresses have been achieved in obtaining global PP as well as its spatial and temporal variations. However, there still exist wide differences between...

  • Raman A.V, Damodaran R., Levin L.A, Ganesh T., Rao Y.KV, Nanduri S., Madhusoodhanan R..  2015.  Macrobenthos relative to the oxygen minimum zone on the East Indian margin, Bay of Bengal. Marine Ecology-an Evolutionary Perspective. 36:679-700.
    Abstract Summary:

    The Bay of Bengal remains one of the least studied of the world's oxygen minimum zones (OMZs). Here we offer a detailed investigation of the macrobenthos relative to oxygen minimum zone [OMZ - DO (dissolved oxygen), concentration <0.5ml1(-1)] at 110 stations off the North East Indian margin (16(0) and 20(0)N) featuring coastal, shelf and slope settings (10-1004m). Macrobenthos (>0.5mm) composition, abundance and diversity were studied...

  • Bromirski PD, Diez A., Gerstoft P, Stephen R.A, Bolmer T., Wiens D.A, Aster R.C, Nyblade A..  2015.  Ross Ice Shelf vibrations. Geophysical Research Letters. 42:7589-7597.
    Abstract Summary:

    Broadband seismic stations were deployed across the Ross Ice Shelf (RIS) in November 2014 to study ocean gravity wave-induced vibrations. Initial data from three stations 100km from the RIS front and within 10km of each other show both dispersed infragravity (IG) wave and ocean swell-generated signals resulting from waves that originate in the North Pacific. Spectral levels from 0.001 to 10Hz have the highest accelerations in the IG band (0....

  • Gocke C., Janussen D., Reiswig H.M, Jarrell SC, Dayton PK.  2015.  Rossella podagrosa Kirkpatrick, 1907: A valid species after all. Zootaxa. 4021:169-177.
    Abstract Summary:

    In this study we provide evidence that the species Rossella podagrosa Kirkpatrick, 1907, commonly considered a synonym of Rossella racovitzae Topsent, 1901, is truly a valid species. We show that it can be clearly distinguished from other species especially when taking into consideration the in situ habitus of the sponge in combination with the spicules. Furthermore we demonstrate the weaknesses in the so far published synonymy concept for...

  • Hally-Rosendahl K., Feddersen F, Clark D.B, Guza RT.  2015.  Surfzone to inner-shelf exchange estimated from dye tracer balances. Journal of Geophysical Research-Oceans. 120:6289-6308.
    Abstract Summary:

    Surfzone and inner-shelf tracer dispersion are observed at an approximately alongshore-uniform beach. Fluorescent Rhodamine WT dye, released near the shoreline continuously for 6.5 h, is advected alongshore by breaking-wave- and wind-driven currents, and ejected offshore from the surfzone to the inner-shelf by transient rip currents. Novel aerial-based multispectral dye concentration images and in situ measurements of dye, waves, and currents...

  • Winters KB.  2015.  Tidally driven mixing and dissipation in the stratified boundary layer above steep submarine topography. Geophysical Research Letters. 42:7123-7130.
    Abstract Summary:

    A tidally driven, stratified boundary layer over supercritical topography is simulated numerically. The near-boundary flow is characterized by quasiperiodic, bore-like motions and episodic expulsion events where fluid is ejected into the stratified interior. The character of the bores is compared to the high-resolution ocean mooring data of van Haren (2006). The diffusivity of the flow near the boundary is estimated by means of a synthetic...

  • Gieskes JM, Han S, Rathburn A, Rothwell G, M. Pérez E, Porrachia M, Barbanti A, Deheyn DD.  2015.  Anthropogenic contaminants in Venice Lagoon sediments and their pore fluids: Results from the SIOSED Project. Marine Chemistry. 174:73-84.
    Abstract Summary:

    Investigations of sediment geochemistry and interstitial water chemistry during SIOSED (Scripps Institution of Oceanography Sediment Research Project) revealed information about the characteristics and depth range of contamination in sediments associated with dredging operations in the Venice Lagoon, Italy. Results from gravity cores indicate that contamination ranges larger and deeper in sediments associated with Porto Marghera and the...

  • Ulloa HN, Winters KB, de la Fuente A, Niño Y.  2015.  Degeneration of internal Kelvin waves in a continuous two-layer stratification. Journal of Fluid Mechanics. 777:68-96.
    Abstract Summary:

    We explore the evolution of the gravest internal Kelvin wave in a two-layer rotating cylindrical basin, using direct numerical simulations (DNS) with a hyper-viscosity/diffusion approach to illustrate different dynamic and energetic regimes. The initial condition is derived from Csanady’s (J. Geophys. Res., vol. 72, 1967, pp. 4151–4162) conceptual model, which is adapted by allowing molecular diffusion to smooth the discontinuous idealized...

  • Neal B.P, Lin T.H, Winter R.N, Treibitz T., Beijbom O., Kriegman D., Kline DI, Mitchell B.G.  2015.  Methods and measurement variance for field estimations of coral colony planar area using underwater photographs and semi-automated image. Environmental Monitoring and Assessment. 187
    Abstract Summary:

    Size and growth rates for individual colonies are some of the most essential descriptive parameters for understanding coral communities, which are currently experiencing worldwide declines in health and extent. Accurately measuring coral colony size and changes over multiple years can reveal demographic, growth, or mortality patterns often not apparent from shortterm observations and can expose environmental stress responses that may take...

  • Bertrand E.M, McCrow J.P, Moustafa A., Zheng H., McQuaid J.B, Delmont T.O, Post A.F, Sipler R.E, Spackeen J.L, Xu K. et al..  2015.  Phytoplankton-bacterial interactions mediate micronutrient colimitation at the coastal Antarctic sea ice edge. Proceedings of the National Academy of Sciences of the United States of America. 112:9938-9943.
    Abstract Summary:

    Southern Ocean primary productivity plays a key role in global ocean biogeochemistry and climate. At the Southern Ocean sea ice edge in coastal McMurdo Sound, we observed simultaneous cobalamin and iron limitation of surface water phytoplankton communities in late Austral summer. Cobalamin is produced only by bacteria and archaea, suggesting phytoplankton-bacterial interactions must play a role in this limitation. To characterize these...

  • Chenillat F, Franks PJS, Riviere P, Capet X, Grima N., Blanke B.  2015.  Plankton dynamics in a cyclonic eddy in the Southern California Current System. Journal of Geophysical Research-Oceans. 120:5566-5588.
    Abstract Summary:

    The California Current System is an eastern boundary upwelling system (EBUS) with high biological production along the coast. Oligotrophic offshore waters create cross-shore gradients of biological and physical properties, which are affected by intense mesoscale eddy activity. The influence of eddies on ecosystem dynamics in EBUS is still in debate. To elucidate the mechanisms that influence the dynamics of ecosystems trapped in eddies, and...

sharknado